Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 17, 2022
Submitted
April 18, 2022
Operation
Air carrier
Aircraft
N947WN
Make and model
Boeing 7377H4
Aircraft serial
36924
Aircraft time
38,976 hours, 23,532 cycles
Part
Intercostal
Condition
Cracked
Location
Fuselage
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

*****MAIN CABIN FWD WET AREA FLOOR SUPPORT INTERCOSTAL CRACK AT UPPER FLANGE AROUND FASTENER HOLE @ BL-0 BETWEEN STA 340-STA 360. / [01] REMOVED INTERCOSTAL AT STA 340 TO STA 360 BL 0.PER B 737-700 SRM 51-40-02-0G-0;[02] VERIFIED REMOVAL;[03] LOCATED AND DRILLED NEW INTERCOSTAL AS REF. B737-700 SRM 51-10-02-0G-0.;[04] VERIFIED DRILLING.<BR>OK TO INSTALL INTERCOSTAL;[05] STARTED INSTALLATION OF NEW INTEROSTAL AT MAIN CABIN FLOOR STUCTURE BWTEEN STA 340-STA 360 BL-0 AS REF .B737-700 SRM 51-40-02-0G-0.;[06] STARTED INSTALLATION OF NEW INTEROSTAL AT MAIN CABIN FLOOR STUCTURE BWTEEN STA 340-STA 360 BL-0 AS REF .B737-700 SRM 51-40-02-0G-0 AND DRAWING #141A5400.;[07] INSTALLED NEW INTEROSTAL AT MAIN CABIN FLOOR STUCTURE BWTEEN STA 340-STA 360 BL-0 AS REF .B737-700 SRM 51-40-02-0G-0 AND DRAWING #141A5400.;[08] VERIFIED STEPS 5;6 AND 7..;[09] VERIFIED ALL STEPS COMPLETE

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